Improvement in sawing-machines



W. C. DANIEL. improvement in Sawing-Mac'hines.

ITEE STATES WILLIAM C. DANIEL, OF POINT PLEASANT, MISSOURI.

IMPROVEMENT` IN SAWING-MACH'INES.

Specification forming part of Letters Patent No. 132,563, dated October29, 1872.

To all whom it may concern:

Be it known that I, WILLIAM C. DANIEL, of Point Pleasant, in the countyof New Madrid and State' of Missouri, have invented a new Improvement inSawing-Machine, of which the following is a specication:

Figure l represents a vertical longitudinal section of my improvedsawing-machine, the line c c, Fig. 2, indicating the plane of section;Fig. 2 is a top view of the same, and Fig. 3 an end elevation.

Similar letters of reference indicate corresponding parts.

This invention relates to a new reciprocating buck-saw, in which thesaw-frame and carriage are vertically adjustable and suspended from awindlass which unwinds automatically by means of an escapementattachment, so that the downward feed of the saw will be regular andgradual.

In the accompanying drawing, the letter A represents the stationaryframe, which serves as support for the machinery and devicesconstituting my invention. The four corner posts a of this frame serveas Vertical guides for two` vertically adjustable frames, B B, that areby cords b suspended from a windlass, C,

' which hangs in a horizontal position in the upper part of the frame A.The frames B have horizontal rails d attached to them, said railsserving as guides and supports for the cross-heads D, which are fastenedto the ends of the saw E. A crank-shaft, F, hung in one of the frames B,connects byapitman, c, with one cross-head D, or end of the saw, so thatwhen said shaft F is revolved, either directly or by gear, or otherconnection, with a driving-shaft, G, hung in the frame B, it will causethe saw to bemoved back and forth along the rails cl. The frames .B areboth always in line, at least their rails d, so that the cross-heads Dwill readily move thereon. The windlass C carries a ratchet-Wheel, f,into which an anchor-shaped pawl g, similar to the anchor of a watchescapement, engages. rThis pawl is at h pivoted to the frame A and is bya rod, fi, connected with a vertical rockshaft, j, that hangs in one endof the frame A. A crank, Z, of the shaft j connects with one of thecross-heads D, so that while the saw moves back and forth the rock-shaft7' will be oscillated. Every oscillation, however, of the rock-shaftwill produce a vibration of the pawl g, which is thus caused to throwlirst one prong, then the other, against the vratchetwheel f. As theentire weight of the frames B, cross-heads D, and saw E, and theirrespective appendanges, hangs on the windlass, by ropes b wound thereon,it is evident that the said weight will descend as much as the releaseof one tooth of the ratchet-wheel by the pawl will permit at everystroke of the saw. The requisite gradual downward feed of the saw isthus produced automatically and with great regularity. The ropes arewound up and the frames B with the saw, 85o., raised, I

previous to the commencement of the sawing operation. The windlass has acrank, m, to be readily revolved for winding up the ropes b. H is alever, pivoted to the frame A and connected with the pawl g. By means ofthis lever the pawl can be slid on its pivot h in or out of gear withthe ratchet-wheel, as may be desired. To support the log to be sawn Iemploy a buck, I, but do not here make it the subject of a claim.l Toone of its cross uprights is pivoted a lever, J, which connects by,

pivot with two jaws, n n, both of which pass through a iixed staple, o,so that they will be spread apart when the lever J is swun p, andcontracted when the same is swung n. The jaws are spread before the logis putin the frame I, and are subsequently contracted against the log tofirmly hold it in place. The lever J is locked in a notched bar, p, inthe requisite position.

Having thus described my invention, I claim as newvand desire to secureby Letters Patent- 1. Thevertically-slidingsaw-carryingframes Bsuspended by cords from a windlass, G, which moves under the restrictionof an escapement attachment, as set forth.

2. The double-acting pawl g connected by a rod, i, rock-shaft j, andcrank l, with the reciprocating saw to regulate the descent ofthe same,substantially as and for the purpose herein shown and described. n

3. The lever H, combined with the pawl g and ratchet-wheel f,substantially as `and for the purpose herein shown and described.

WILLIAM C. DANIEL.

Witnesses JAs. I. STAYToN, WM. E. FAIRE.

